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Bug 847714 - Halve drawing buffer sizes until resize succeeds - r=bjacob

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This commit is contained in:
Jeff Gilbert 2013-03-06 17:36:59 -08:00
parent 15c1656a77
commit cc3b3bd022
1 changed files with 37 additions and 5 deletions
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42
content/canvas/src/WebGLContext.cpp
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@ -381,9 +381,24 @@ WebGLContext::SetDimensions(int32_t width, int32_t height)
if (gl) {
MakeContextCurrent();
gl->ResizeOffscreen(gfxIntSize(width, height)); // Doesn't matter if it succeeds (soft-fail)
bool success = false;
while (width && height) {
gfxIntSize size(width, height);
if (gl->ResizeOffscreen(size)) {
success = true;
break;
}
width /= 2;
height /= 2;
}
// It's unlikely that we'll get a proper-sized context if we recreate if we didn't on resize
if (!success) {
ForceLoseContext();
return NS_OK;
}
// everything's good, we're done here
mWidth = gl->OffscreenSize().width;
mHeight = gl->OffscreenSize().height;
@ -505,12 +520,19 @@ WebGLContext::SetDimensions(int32_t width, int32_t height)
}
#endif
gfxIntSize size(width, height);
#ifdef XP_WIN
// if we want EGL, try it now
if (!gl && (preferEGL || useANGLE) && !preferOpenGL) {
gl = gl::GLContextProviderEGL::CreateOffscreen(size, caps);
while (width && height) {
gfxIntSize size(width, height);
gl = gl::GLContextProviderEGL::CreateOffscreen(size, caps);
if (gl)
break;
width /= 2;
height /= 2;
}
if (!gl || !InitAndValidateGL()) {
GenerateWarning("Error during ANGLE OpenGL ES initialization");
return NS_ERROR_FAILURE;
@ -523,7 +545,17 @@ WebGLContext::SetDimensions(int32_t width, int32_t height)
GLContext::ContextFlags flag = useMesaLlvmPipe
? GLContext::ContextFlagsMesaLLVMPipe
: GLContext::ContextFlagsNone;
gl = gl::GLContextProvider::CreateOffscreen(size, caps, flag);
while (width && height) {
gfxIntSize size(width, height);
gl = gl::GLContextProvider::CreateOffscreen(size, caps, flag);
if (gl)
break;
width /= 2;
height /= 2;
}
if (gl && !InitAndValidateGL()) {
GenerateWarning("Error during %s initialization",
useMesaLlvmPipe ? "Mesa LLVMpipe" : "OpenGL");